1649632529 has 4 divisors (see below), whose sum is σ = 1649778660. Its totient is φ = 1649486400.

The previous prime is 1649632511. The next prime is 1649632583. The reversal of 1649632529 is 9252369461.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 748131904 + 901500625 = 27352^2 + 30025^2 .

It is a cyclic number.

It is not a de Polignac number, because 1649632529 - 2¹⁶ = 1649566993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1649632129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54572 + ... + 79229.

It is an arithmetic number, because the mean of its divisors is an integer number (412444665).

Almost surely, 2^1649632529 is an apocalyptic number.

It is an amenable number.

1649632529 is a deficient number, since it is larger than the sum of its proper divisors (146131).

1649632529 is a wasteful number, since it uses less digits than its factorization.

1649632529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146130.

The product of its digits is 699840, while the sum is 47.

The square root of 1649632529 is about 40615.6685159804. The cubic root of 1649632529 is about 1181.5780211474.

The spelling of 1649632529 in words is "one billion, six hundred forty-nine million, six hundred thirty-two thousand, five hundred twenty-nine".